# \[Feature:1.9\] Enumerable#uniq **URL:** \ **Category:** Development\ **Created:** [February 13, 2009, 2:19pm UTC](https://www.ruby-forum.com/t/feature-1-9-enumerable-uniq/160259 "2009-02-13T14:19:12Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![nobu](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/e9c0ed/32.png) [@nobu](https://www.ruby-forum.com/u/nobu)\ **Post date:** [February 13, 2009, 2:19pm UTC](https://www.ruby-forum.com/t/feature-1-9-enumerable-uniq/160259/1 "2009-02-13T14:19:12Z")
e$B$J$+$@$G$9!#e(B Arraye$B$@$1$G$J$/!“e(BEnumerablee$B$K$be(Buniqe$B$,$”$C$F$b$$$$$s$8$c$J$$$G$7$ge(B e$B$&$+!#e(B # Index: enum.c — enum.c (revision 22100) +++ enum.c (working copy) @@ -1794,4 +1794,29 @@ enum\_cycle(int argc, VALUE \*argv, VALUE } +static VALUE +enum\_uniq\_i(VALUE i, VALUE hash, int argc, VALUE \*argv) +{ - return rb\_hash\_aset(hash, i, Qtrue); +} - +static int +push\_key(st\_data\_t key, st\_data\_t val, st\_data\_t ary) +{ - rb\_ary\_push((VALUE)ary, (VALUE)key); - return ST\_DELETE; +} - +static VALUE +enum\_uniq(VALUE obj) +{ - VALUE hash = rb\_hash\_new(), uniq; - - RBASIC(hash)-\>klass = 0; - rb\_block\_call(obj, id\_each, 0, 0, enum\_uniq\_i, hash); - uniq = rb\_ary\_new2(RHASH\_SIZE(hash)); - st\_foreach(RHASH\_TBL(hash), push\_key, uniq); - return uniq; +} - /\* - The `Enumerable` mixin provides collection classes with @@ -1853,4 +1878,5 @@ Init\_Enumerable(void) rb\_define\_method(rb\_mEnumerable, “drop\_while”, enum\_drop\_while, 0); rb\_define\_method(rb\_mEnumerable, “cycle”, enum\_cycle, -1); - rb\_define\_method(rb\_mEnumerable, “uniq”, enum\_uniq, 0); ---
**Author:** ![nobu](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/e9c0ed/32.png) [@nobu](https://www.ruby-forum.com/u/nobu)\ **Post date:** [February 14, 2009, 2:01am UTC](https://www.ruby-forum.com/t/feature-1-9-enumerable-uniq/160259/2 "2009-02-14T02:01:13Z")
e$B1sF#$G$9!#e(B 2009/02/13 22:17 Nobuyoshi N. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid): > e$B$J$+$@$G$9!#e(B > > Arraye$B$@$1$G$J$/!“e(BEnumerablee$B$K$be(Buniqe$B$,$”$C$F$b$$$$$s$8$c$J$$$G$7$ge(B > e$B$&$+!#e(B e$B;d$b$$$$$H;W$$$^$9!#e(B e$BJX\>h$G$9$,!"e(BEnumerable#compact e$B$b$[$7$$$G$9!#e(B # Index: enum.c — enum.c (revision 22297) +++ enum.c (working copy) @@ -1793,6 +1793,32 @@ return Qnil; /\* not reached \*/ } +static VALUE +compact\_i(VALUE i, VALUE ary, int argc, VALUE \*argv) +{ - VALUE val = enum\_values\_pack(argc, argv); - if (!NIL\_P(val)) rb\_ary\_push(ary, val); - return Qnil; +} - +/\* - - call-seq: - - ``` enum.compact -> array ``` - - - - Returns an array containing the items in _enum_ with all +nil+ - - elements removed. - - - - ``` ["a", nil, "b", nil, "c"].to_enum.compact #=> [ "a", "b", "c" ``` ] - \*/ - +static VALUE +enum\_compact(VALUE obj) +{ - VALUE ary = rb\_ary\_new(); - rb\_block\_call(obj, id\_each, 0, 0, compact\_i, ary); - return ary; +} - /\* - The `Enumerable` mixin provides collection classes with - several traversal and searching methods, and with the ability to @@ -1852,6 +1878,7 @@ rb\_define\_method(rb\_mEnumerable, “drop”, enum\_drop, 1); rb\_define\_method(rb\_mEnumerable, “drop\_while”, enum\_drop\_while, 0); rb\_define\_method(rb\_mEnumerable, “cycle”, enum\_cycle, -1); - rb\_define\_method(rb\_mEnumerable, “compact”, enum\_compact, 0); ---
**Author:** ![nobu](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/e9c0ed/32.png) [@nobu](https://www.ruby-forum.com/u/nobu)\ **Post date:** [February 14, 2009, 3:06am UTC](https://www.ruby-forum.com/t/feature-1-9-enumerable-uniq/160259/3 "2009-02-14T03:06:44Z")
e$B$^$D$b$He(B e$B$f$-$R$m$G$9e(B In message “Re: [ruby-dev:38002] Re: [Feature:1.9] Enumerable#uniq” on Sat, 14 Feb 2009 09:59:14 +0900, Yusuke ENDOH [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) writes: |e$BJX\>h$G$9$,!"e(BEnumerable#compact e$B$b$[$7$$$G$9!#e(B uniqe$BF1MM!“A4FI$_9~$_$,I,MW$J%a%=%C%I$rA}$d$9$N$O$”$^$j;?@.$7e(B e$B$^$;$s!#e(B Enumeratore$B$rJV$9e(Bcompacte$B$G$“$l$P$b$7$+$7$?$i2ACM$,$”$k$+$b$7e(B e$B$l$^$;$s!#$1$I!“e(BArraye$B$HLa$jCM$,0c$&$N$ONI$/$J$$$+$b$7$l$^$;e(B e$B$s$M$(!#e(BLazyArraye$B$N$h$&$J$b$N$,$”$l$P$h$$$N$+$J!#e(B ---
**Author:** ![nobu](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/e9c0ed/32.png) [@nobu](https://www.ruby-forum.com/u/nobu)\ **Post date:** [February 14, 2009, 3:02am UTC](https://www.ruby-forum.com/t/feature-1-9-enumerable-uniq/160259/4 "2009-02-14T03:02:37Z")
e$B$^$D$b$He(B e$B$f$-$R$m$G$9e(B In message “Re: [ruby-dev:37997] [Feature:1.9] Enumerable#uniq” on Fri, 13 Feb 2009 22:17:21 +0900, Nobuyoshi N. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) writes: |Arraye$B$@$1$G$J$/!“e(BEnumerablee$B$K$be(Buniqe$B$,$”$C$F$b$$$$$s$8$c$J$$$G$7$ge(B |e$B$&$+!#e(B Enumerablee$B$OM-8B$NJ]\>Z$,$J$$$N$GA4FI$_9~$_$,I,MW$J%a%=%C%I$re(B e$B$3$l0J\>eA}$d$9$N$O$I$&$+$H;W$$$^$9!#$b$&$9$G$K$"$k$N$O:o$l$Je(B e$B$$$K$7$F$b!#e(B